About Us:

King County Water District No. 20 was established by voters in November 1925.  The District’s beginnings consisted of a pump house and a well in the vicinity of South 100^th Street and 10^th Avenue South.  Early water mains were constructed by hand placing galvanized lines.  The District first connected to City of Seattle water supply mains in the 1930’s.  An elevated storage reservoir was constructed near 1^st Avenue South and South 108^th Street and was used until the late 1950s. 

During the late 1970s, a consortium of water districts (King County Water District 20, 45, 85 and 125) built a six million gallon reservoir that is still in use today. 

Most recently, King County Water District No. 85 merged with Water District No. 20 forming the District’s service area as it is today (below).

Our Service Area (inside the blue boundary line): 

History/Trivia:

• First Commissioners elected by vote of the people on November 14, 1925, were William C. Wilson; M.O. Simpson; and Alfred T. Osberg.

• First Commissioners' meeting held November 21, 1925 at the offices of Shorett and Shorett, 1377-80 Dexter Horton Building, Seattle; Commissioners were administered the oath of office by Edward H. Taylor, Notary Public.

• First Attorney: John B. Shorett

• First Contracted Engineer: Miller Engineering Co.

• First Assessed Valuation amount: $574,685.00

• First Voucher amount: $1130.00, Attorney fees

• First Service Installation Bid from Pacific Water Works and Supply - Complete: in dirt road, $18.00; paved road, $21.00

• First Payment to McHugh and Coluccio for Distribution System, $9819.34

• First Service installed: A.T. Osberg, 10028 16th So. $22.00, 10/30/1926

• Original office located at 1822 S. 120th St.